Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
  • B60B17/00—Wheels characterised by rail-engaging elements
  • B60B17/0027—Resilient wheels, e.g. resilient hubs
  • B60B17/0031—Resilient wheels, e.g. resilient hubs using springs
  • B60B17/0034—Resilient wheels, e.g. resilient hubs using springs of rubber or other non-metallic material
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
  • B60B17/00—Wheels characterised by rail-engaging elements
  • B60B17/0027—Resilient wheels, e.g. resilient hubs
  • B60B17/0031—Resilient wheels, e.g. resilient hubs using springs
  • B60B17/0034—Resilient wheels, e.g. resilient hubs using springs of rubber or other non-metallic material
  • B60B17/0044—Resilient wheels, e.g. resilient hubs using springs of rubber or other non-metallic material single element arranged in V-form
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
  • B60B17/00—Wheels characterised by rail-engaging elements
  • B60B17/0027—Resilient wheels, e.g. resilient hubs
  • B60B17/0031—Resilient wheels, e.g. resilient hubs using springs
  • B60B17/0034—Resilient wheels, e.g. resilient hubs using springs of rubber or other non-metallic material
  • B60B17/0048—Resilient wheels, e.g. resilient hubs using springs of rubber or other non-metallic material pair of elements arranged in V-form
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
  • B60B9/00—Wheels of high resiliency, e.g. with conical interacting pressure-surfaces
  • B60B9/02—Wheels of high resiliency, e.g. with conical interacting pressure-surfaces using springs resiliently mounted bicycle rims
  • B60B9/10—Wheels of high resiliency, e.g. with conical interacting pressure-surfaces using springs resiliently mounted bicycle rims of rubber or the like
  • B60B9/12—Wheels of high resiliency, e.g. with conical interacting pressure-surfaces using springs resiliently mounted bicycle rims of rubber or the like in the form of sleeves or rings concentric with the wheel axis
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
  • B60B17/00—Wheels characterised by rail-engaging elements
  • B60B17/0065—Flange details
  • B60B17/0068—Flange details the flange being provided on a single side
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
  • B60B2900/00—Purpose of invention
  • B60B2900/10—Reduction of
  • B60B2900/112—Costs
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
  • B60B2900/00—Purpose of invention
  • B60B2900/10—Reduction of
  • B60B2900/113—Production or maintenance time
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
  • B60B2900/00—Purpose of invention
  • B60B2900/10—Reduction of
  • B60B2900/131—Vibrations
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
  • B60B2900/00—Purpose of invention
  • B60B2900/10—Reduction of
  • B60B2900/133—Noise
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
  • B60B2900/00—Purpose of invention
  • B60B2900/30—Increase in
  • B60B2900/311—Rigidity or stiffness

Definitions

• the present invention relates to an elastic wheel for rail vehicles, especially designed for urban rail vehicles such as trams, subways, or light trains.
• Elastic wheels are usually used in trams, or other types of rail vehicles that run mainly through urban environments. These wheels are designed with the purpose of damping the vibrations resulting from rolling and reducing the noise produced as much as possible.
• the elastic wheels are conventionally composed of an elastomer, in the form of a single annular block, or in the form of a set of individual blocks, which is inserted in a defined housing between the tread, the center of the wheel, and a ring that compress the elastomer against the center of the wheel.
• the mooring of the ring to the center of the wheel is usually done by a set of retaining bolts.
• the objective pursued by the arrangement of the elastomer in the housing defined between the ring, the wheel center and the tread, is to achieve an adequate relationship of flexibility and vibration damping.
• an elastic wheel which has an elastomer formed by a set of rubber blocks that are arranged in a practically horizontal manner in the housing defined between the tread, the center of the wheel, and the hoop of retention.
• the elastomer has a very open "V" shape with an approximate angle of 15 ° from the horizontal, a horizontal line being understood approximately parallel to the axis of the wheel.
• This type of elastic wheels has a low stiffness in the axial direction, because the elastomer works shear in that direction. Low axial stiffness has a negative influence on the dynamic behavior of the train and can cause premature deterioration of the elastomer due to the high deformations that it undergoes during service.
• the solution of WO 9520499 is known, which proposes to insert metal parts into the elastomer, so that they work in compression in the axial direction.
• European Patent EP 679,540 is also known, which has an elastomer formed by rubber-coated metal blocks, which are intercalated between blocks composed solely of rubber.
• Another type of elastic wheel is that proposed by European Patent EP 489,455, where in the housing defined between the tread, the center of the wheel, and the retaining ring, a "V" shaped elastomer is inserted with An angle of 60 ° from the horizontal.
• This solution guarantees a sufficiently high axial stiffness, but it has a complex geometry that affects the manufacturing cost.
• the elastomer is composed of a single annular block crossed by screws that connect the wheel center and the retaining ring.
• This solution requires the manufacture of a mold for each elastic wheel design. It is also a not very versatile solution, since a change in wheel diameter requires the development of specific molds for the manufacture of the single annular block of the elastomer. And on the other hand, it is necessary to make grooves of complex geometry to ensure a robust bond between the elastomer and the metal parts, which influences the cost of machining the metal parts.
• an elastic wheel is proposed applicable to railway vehicles that pass through urban environments, such as meters, trams or light meters.
• This elastic wheel object of the invention is formed by a tread and a wheel center that define a housing for the insertion of an elastomer that is compressed by a retaining ring that is attached to the wheel center by means of connecting screws, being formed the elastomer by a plurality of "V" shaped elastic blocks.
• the housing defined between the tread, the wheel center and the retention ring, where the elastic blocks are compressed has two oblique walls, respectively belonging to the wheel center and the retention ring, which form an angle of between 48 ° and 52 ° with respect to the horizontal, and preferably an angle of 50 °.
• the oblique walls of the wheel center and of the retention ring finish in respective inclined sections in which the vertices of the "V" shaped elastic blocks support, forming the inclined sections at an angle of between 2 o and 10 ° with respect to the horizontal.
• Figure 1 shows a partial cross-sectional view of an elastic wheel according to the invention.
• Figure 2 is an enlarged detail of the housing where the wheel elastomer is introduced.
• Figure 3 shows a side view of the elastic wheel.
• Figure 1 shows a cross-sectional view of the set of elements that constitute the elastic wheel object of the present invention.
• the elastic wheel is shaped like a body of revolution generated around the axle (R) of the wheel and is composed of a tread (1), which is the part of the wheel that circulates on the tread, and a center ( 2) wheel or wheel hub.
• a housing is defined where an elastomer is compressed, which is retained by a ring (3) that is attached to the wheel center (2) by means of connecting screws (4), which do not interfere with the elastomer, being located below it.
• the elastomer retained in the housing is formed by a plurality of blocks (5) in the form of "V", made of a completely elastic material, which provide a great capacity for damping the wheel.
• the housing where the elastic blocks (5) are compressed is defined by two oblique walls (2.1, 3.1) respectively belonging to the wheel center (2) and the retention ring (3), each of said oblique walls (2.1, 3.1) an angle (a) of between 48 ° and 52 ° with respect to the horizontal, preferably an angle (a) of 50 °, which ensures a good axial and radial stiffness of the elastic wheel; horizontally meaning a line parallel to the axis (R) of the wheel.
• the oblique walls (2.1, 3.1) of the center (2) and wheel rim (3) retaining end in respective sections inclined (2.2, 3.2) forming an angle ( ⁇ ) of between 2 ° and 10 ° respect to the horizontal.
• the vertices of the "V" shaped elastic blocks (5) are supported, so that thanks to the area slightly Conical defining between the two facilitates the assembly and disassembly of the elastic blocks (5).
• the elastic blocks (5) seat homogeneously in the wheel center (2) and that the compression effort exerted by the retaining ring (3) in the assembly, is also homogeneous.
• this area defined by the inclined sections (2.2, 3.2) prevents the appearance of folds in the material of the elastic blocks (5).
• elastic blocks (5) provides great versatility and a great competitive advantage, with respect to elastic wheel solutions with a single annular block. In fact, it allows the realization of significant modifications in the design of the wheel, without the need to manufacture a new mold; and by including a sufficient number of elastic blocks (5), the in-service behavior is equivalent to those solutions with a single annular block.
• the elastic blocks (5) are compressed between 20 and 30% with respect to their original size, ensuring this high level of compression a robust union between said elastic blocks (5) and the metal parts of the band rolling (1), wheel center (2) and retaining ring (3). In this way, unwanted movements between parts in service are avoided, without the need to machine complex grooves in the metal parts.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Vibration Prevention Devices (AREA)
• Tires In General (AREA)
• Connection Of Plates (AREA)
• Rolling Contact Bearings (AREA)
• Braking Arrangements (AREA)

Priority Applications (16)

Applications Claiming Priority (2)

Publications (1)

Family

ID=46982995

Family Applications (1)

Country Status (21)

Cited By (3)

Families Citing this family (6)

Citations (9)

Family Cites Families (19)

• 2012
  • 2012-07-30 ES ES201231225A patent/ES2389425B1/es not_active Expired - Fee Related
• 2013
  • 2013-07-16 DK DK13824801.8T patent/DK2881260T3/en active
  • 2013-07-16 RS RS20170958A patent/RS56415B1/sr unknown
  • 2013-07-16 SI SI201330789T patent/SI2881260T1/sl unknown
  • 2013-07-16 IN IN269KON2015 patent/IN2015KN00269A/en unknown
  • 2013-07-16 EP EP13824801.8A patent/EP2881260B1/en active Active
  • 2013-07-16 ES ES13824801.8T patent/ES2642639T3/es active Active
  • 2013-07-16 BR BR112015001873-4A patent/BR112015001873B1/pt active IP Right Grant
  • 2013-07-16 CN CN201380040706.4A patent/CN104684738B/zh active Active
  • 2013-07-16 PL PL13824801T patent/PL2881260T3/pl unknown
  • 2013-07-16 CA CA2879936A patent/CA2879936C/en active Active
  • 2013-07-16 HU HUE13824801A patent/HUE036202T2/hu unknown
  • 2013-07-16 WO PCT/ES2013/070513 patent/WO2014020203A1/es active Application Filing
  • 2013-07-16 MX MX2015001401A patent/MX349713B/es active IP Right Grant
  • 2013-07-16 AU AU2013298475A patent/AU2013298475B2/en active Active
  • 2013-07-16 US US14/417,341 patent/US10112437B2/en active Active
  • 2013-07-16 LT LTEP13824801.8T patent/LT2881260T/lt unknown
  • 2013-07-16 PT PT138248018T patent/PT2881260T/pt unknown
  • 2013-07-18 TW TW102125724A patent/TWI586556B/zh active
  • 2013-07-29 SA SA113340768A patent/SA113340768B1/ar unknown
• 2015
  • 2015-01-23 ZA ZA2015/00502A patent/ZA201500502B/en unknown
• 2017
  • 2017-09-20 HR HRP20171420TT patent/HRP20171420T1/hr unknown

Patent Citations (9)

Non-Patent Citations (1)

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